Controlling system for electric-lamp heaters.



No. 652,636. Patented June 26, 190011 H. N. POTTER.

CONTROLLING SYSTEM FOR ELECTRIC LAMP HEATERS.

, (Application filed Aug. 14, 1899.) (No Model.)

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rrrct HENRY NOEL POTTER, OF'GUTTINGEN, GERMANY, ASSIGNOR TO GEORGE IVESTINGHOUSE, OF PITTSBURG, PENNSYLVANIA.

CONTROLLING SYSTEM FOR ELECTRIC-LAMP HEATERS.

SPECIFICATION forming part of Letters Patent No. 652,636, dated June 26, 1900.

Application filed August 14, 1899. Serial No, 727,146. (No model.)

To all whom it may concern:

Be it known that I, HENRY NOEL POTTER, a citizen of the United States of America, residing in Gottingen, Germany, have invented certain new and useful Improvements in Controlling Systems for Electric-Lamp Heaters, of which the following is a specification.

In another application for Letters Patent of the United States I have shown and described means for controlling the movement of a heater for lamp-glowers through the me dium of a solenoid in series with the said heater. In the lighting device illustrated in connection with the said application I employ a heater having a double movement-first, toward the glower in order to more effectively accomplish the heating thereof, and, second, away from the glower in order to remove the heater from a position where it might interfere with the useful light-rays proceeding from the glower.

In the present application I also illustrate a double-movement heater, although I may use the general circuits illustrated in. this application in connection with a heater having only single movement-that is to say, a heater which is originally in operative proximity to the glower and which is Withdrawn by magnetic or thermostatic means after the initial work of heating has been accomplished.

The present invention relates to the employment of such magnetic or thermostatic means for controlling the heater, these means beingincluded in a shunt-circuit to the heater and not located in series with the heater, as in the application above referred to.

The accompanying drawing, which illustrates my invention, is a diagram of the circuits and apparatus which I employ in carrying out the present invention.

The glower is shown at A and the doublemovement heater at B. The latter is supported from the core K of a solenoid O. The said core K is normally held up by a spring S or other suitable device in such a position as to retain the heater 13 away from proximity to the glower A; Should the solenoid O, however, become energized by the passage of electric current, the force of the spring S will be overcome, the coreK will be drawn 'downward, and the heater B will be carried with it until it comes into operative proximity to the glower A.

At D, I show a ballast cut-out consisting, essentially, of a ballast-conductor 1, of iron or other suitable material, in closed in a sealed chamber 2, containing an inert gas. The said ballast-conductor 1 is connected to a wire 3, of nickelor platinum, which wire is joined by the conductor 4 to oneof the two mains 5 and 6, proceeding from any suitable source of electrical current. The wire 3 is sealed into a disk '7, of glass, the edges of which rest against the:inner walls of the chamber 2 and, together with a similar. disk 8 at the bottom of the said chamber, hold the apparatus with-;

in the said chamber in position. In the center of the two disks is supported a metallic rod 9, to which is pivoted an angular lever 10, one end of which is joined to but insulated from the lower end of the ballast-conductor 1. The opposite end of the said angular lever is in contact with a terminal 11, rigidly connected with the disk '7 and supported thereby. The lever is held in contact with the terminal 11 by the tension of the ballast-conductor 1. The ballast-conductor 1 is joined vby a flexible conductor 18, sealed into the wall of the chamber 2, to the conductor 12, leading to one terminal of the glower, the op posite terminal of the glower being connected by the conductors 13 and 14 to the main 6. The fixed terminal 11 is connected by the conductor 19 to the conductor 4, and the lower end of the rod 9 is connected by the conduc tor 15 to one terminal of the heater B.

In place of the disks 7 and 8 I may employ arms arranged to come in contact with the walls of the chamber 2.

It will be seen that the solenoid O is in a shunt-circuit 1'7 around the heater B. The said heater may be of any of the usual forms; but I have shown it in the present instance as of U-shaped cross-section and as carrying the heating-conductor upon the external surface of the U shaped body. The supportingbody for the heating-conductor maybe of porcelain, talcite, or some similar insulating and heat-resisting material.

When the circuit of the lighting device or lamp illustrated is first closed, the heater is at once brought into operation by the pas sage of the current over the following course: conductors 14 and 16, heater B, conductor 15, rod 9, angular lever 10, contact-terminal 11, conductor 19, and wire to the main 5. The glower-circuit passes by Way of conductors 14 and 13, glower A, conductors 12 and 18 to the ballast-conductor 1 and conductors 3 and 4 to the main 5; but on the closing of the circuit of the lighting device or lamp the current will divide, a portion of it passing through the heater-circuit above described and a portion through the shunt-circuit 17, including the solenoid 0. Accordingly the solenoid will draw down its core K and also the heater B into proximity with the glower A,where the heater will remain until the glower becomes conductive. Then the glower-circuit will be energized, the ballast-conductor 1 will be heated and will expand under the influence of such heat, thus moving the angular lever 10 under the influence of the spring w, and the heater circuit will then be broken at the point 11, and the spring S will retract the j through the medium of a controller in a shuntcircuit.

I claim as my invention 4 1. In an electric lamp, a glower of the type described, an electric heater for the glower, a controller for determining the relative positions of the heater and glower, said controller being located in a circuit that is in shunt to the heater and. outside the glo wercircuit.

2. In an electric-lighting device, a glower of the type described, a heater therefor, said glower and heater being located in parallel circuit, a controlling device for determining the relative positions of the glower and the heater, said controlling device being located in a shunt-circuit around the heater, and outside the glower-circuit.

3. In an electric-lighting device, a glower of the type described, an electric heater therefor, and a ballast-conductor in series with the glower, in combination with an automatic controlling device for the said heaterlocated in a shunt thereto.

4. In an electric-lighting device,a glower ot' the type described, an electric heater therefor, a controller for determining the position of the heater comprising an armature or core connected with the heater and a solenoid connected in shunt-circuit around the heater and outside the glower-circuit.

Signed by me at Hanover, Germany, this 14th day of July, 1899.

HENRY NOEL POTTER.

Witnesses:

W. K. ANDERSON, KIRKE LATHROP. 

